On Friday, 15 March 2019 08:57:33 UTC, Robin wrote:

c. the remote does work from inside the house *but* only because the
sensor is in line of sight of the window over the drawer under where the
remote is stowed. It's a window with no fancy coatings on the glass
though, so even that's not guaranteed.

Ah, yes, that'll be the difference. Mine's not visible through the window so for me the remote is unfortunately more of a change-the-settings-without-a-ladder feature. All that said, it seems a decent enough light and comes with a 3yr warranty for some reassurance.